Nxc-co-nh-



United States Patent 2,734,051 ASYMMETRICAL CUPRIFEROUS POLYAZO DYESTUFFS a Ernst Iseiin, Dornacll, near vBasel Switzerland, assignor to Sandoz, A. G. Basel, Switzerland No Drawing. Application December 10,1952, '7

Serial No. 325,209 I Claims priority, application Switzerland December, 18, 1951 6 Claims. (Cl. 260-145) wherein R1 is a radical of the benzene or naphthalene series, R2 is also a radical of the benzene or naphthalene series, x is the simple diphenyl linkage or the -CH=CH, the -NH.CO'-, the +CO.NH or' the NH.CO.NH bridge, y is a hydrogen atom or a carboxy or sulfonic acid group, v is a hydrogen atom or the hydroxy, the amino, a lower alkylamino, a cycloalkylamino, a mononuclear arylamino or an acylarnino group, w is in orthoposition relative to v and represents a hydrogen atom, an -N=N aryl group or an N=N- pyrazolone group, b is in ortho-position relative 'to azo and represents a methoxy or ethoxy group, n is one of the integers 1, 2 and 3, and'wherein --OH is in ortho-position and 'N=N is in para-position relative to --azo"-, and -COOH is in ortho-position relative to azo! c These valuable metalliferous polyazo dyestuifs are obtained by coupling one mol of a diazotized substituted or unsubstituted ortho-aminocarboxylic acid of the benzene or naphthalene series with one mol of an acetoacetylamino compound of the formula on, 1 wherein x and y have the previously-recited significances and z stands for amino, nitro or a readily-saponifiable acylamino group, if necessary converting the nitro or acylamino group into the amino group, diazotizingthe soobtained aminoazo compound, combining the product with one mol of an amine of the benzene or naphthalene series which couples in para-position to the amino group and carries, in ortho-position to the amino.group,'a'group which is capable of metal complex formation, further diazotizing the resultant disazo dyestuif, coupling the thusobtained diazotized product in ortho-position to the'hydroxyl group with one mol of a hydroxynaphthalene of the formula i b I HO v 2 wherein one of the positions ortho to the hydroxyl group is capable of coupling, and wherein n, v, and w have the previously-recited significances, w being ortho-positioned relative to v, and finally treating the produced polyazo dyestuff with metal-yielding agent. i

According to an alternative mode of procedure, one mol of the diazo compound from an amine of the formula wherein a is the nitro group or a saponifiable acylamino group, and x and y have the previously-recited significams; is coupled with one mol of an amine of the hen zene or naphthalene series which couples inpara-position to the-aminogroup and carries, in 'orth'o-position'to the amino group, a group which is capable of metal complex formation, diazotizing the so-obtained arnin'oazo coinpound and then coupling the diazotized product without: mol of a hydroxynaphthalene comp oundfof Formula II in ortho-position to the hydroxy group, converting the nitro or acylamino group in the resultant disazo dyestufi into the aminogroup, condensing theaminodisazo dyestufi with diketenefcoupling the condensation product with one mol of a di'azotized substituted or unsubstituted ortho aminocarboxylic acid of the benzene or naphthalene metal-yielding agent.

Metalliferous polyazo dyestufis, obtainable according to the two described processes and in which x is the NH.CO- group, can also be prepared by coupling one mol of a diazotized substituted or unsubstituted ortho aminocarboxylic acid of the benzene of naphthalene series withone mol of an acetoacetylamino compound of the but u (IV) wherein y and 2 have the previously-recited significances, if necessary converting the nitro or acylamino group into the amino group, reacting the amin'oazo compound'with one mol of an acid halide of the formula Mb-FfQ-Nfh 1/ wherein hal is C1 or Br and y has the previously-recited significance, converting the nitro group into the amino group, diazotizing the so-obtained aminoazo compound, coupling the diazotized product with one mol of an amine of the benzene or naphthalene series which couples in para-position to the amino group and carries, in orthoposition to the amino group, a group which is capable of metal complex formation, further diazotizing the resultant disazo dyestutf, coupling the thus further diazotized product with one mol of a hydroxyn aphthalene of Formula II in ortho-po'sition tothe hydroxy group, and treating the polyazo dyestufi with metal-yielding agent.

Illustrative of the acetoacetylamino compounds of Formula I for use in the first process embodiment above described are: v

4-acetoacetylamino-4-nitrostilbene-2,2'-disu1fonic acid, 4-acetoacetylamino-4-aminostilbene-2,2Gdisulfonic acid,

series, and treating the resultant polyazo dyestufi with 9 a 4-acetoacetylamino-4'-carbethoxyaminostilbene-2,2'-disu1- fonic acid, 4-acetoacetylamino-4'-oxalylaminostilbene-2,2-disulfonic acid, 4-acetoacetylamino-4-aminodiphenyl, 4-acetoacetylamino-4-carbethoxyaminodiphenyl, 4-acetoacetylamino-4-aminodiphenyl-3'-sulfonic acid, 4-acetoacetylamino-4-oxalylaminodiphenyl-3-sulfonic acid, 4-acetoacetylamino-4'-carbomethoxyaminodiphenyl-3-sulfonic acid, 4-acetoacetylamino-1-(4'-aminobenzoyl)-aminobenzene, 4-acetoacetylamino-1-(4'-nitrobenzoyl) -aminobenzene, 4-acetoacetylamino- 1- (4'-aminobenzoy1) -aminobenzene 2-sulfonic acid, 4-acetoacetylamino-1- (4'-aminobenzoyl) -aminobenzene- Z-carboxylic acid, 4-amin0- l- (4'-acetoacetylaminobenzoyl) -aminob enzene, 4-amino-1-(4'-acetoacetylaminobenzoyl)-aminobenzene- 3-sulf0nic acid, 4-amino-1-(4'-acetoacetylaminobenzoyl)-aminobenzene 3-carboxylic acid, 4-acetoacetylamino-4-amino-1,l'-diphenylurea, 4-acetoacetylamino-4'-nitro-1, l-diphenylurea, 4-acetoacetylamino-4-amino-1,1'-diphenylurea-3'-sulfonic acid, etc.

The compounds of Formula I are prepared by reacting one mol of diketene with one mol of an amine of the formula (VI) wherein x, y and z have the previously-recited significances, in aqueous solution or in an inert organic solvent at temperatures of 20 to 60 C. Diketene is stable to water at temperatures of 20 to 60 C., but reacts readily with primary amines. The reaction takes place with special ease if the amine reactant is unsubstituted in the ortho-positions. On the other hand, in those cases where, for example, a sulfonic acid group stands in ortho-position to the amino group, the reaction does not take place or proceeds only with difiiculty. This property makes it possible to react diamines, which have a sulfonic acid group in ortho-position to an amino group, with diketene in such manner that only the one free amino group reacts.

Illustrative of ortho-aminocarboxylic acids of the benzene or naphthalene series, which may be used in all embodiments of the processes for preparing the products of the present invention, are:

Z-aminobenzene-l-carboxylic acid, 2-amino-1-carboxybenzene-4-sulfonic acid, Z-amino-1-carboxybenzene-S-sulfonic acid, Z-amino-S-nitrobenzene-l-carboxylic acid, 2-aminonaphthalene-3-carboxylic acid, etc.

Illustrative of the amines of the benzene or naphthalene series which couple in para-position to the amino group and carry, in ortho-position to the amino group, a group which is capable of metal complex formation, are:

1-amino-2-methoxybenzene, I-amino-Z-methoxy-S-methylbenzene, 1-amino-2,S-dimethoxybenzene, 1-arnino-2-methoxynaphthalene, 1-amino-2-methoxynaphthalene-6-sulfonic acid, 1-amino-2-ethoxynaphthalene-6-sulfonic acid, etc.

Illustrative of the hydroxynaphthalene compounds of Formula H for use in preparing the dyestuffs of the present invention are:

l-hydroxynaphthalene, Z-hydroxynaphthalene, 1-hydroxynaphthalene-3-sulfonic acid,

4- 1-hydroxynaphthalene-4-sulfonic acid, 1-hydroxynaphthalene-S-sulfonic acid, l-hydroxynaphthalene-3,6-disulfonic acid, l-hydroxynaphthalene-3,8-disulfonic acid, 2-hydroxynaphthalene-4-sulfonic acid, 2-hydroxynaphthalene-6-sulfonic acid, 2-hydroxynaphthalene-7-su1fonic acid, l-hydroxy-6-aminonaphthalene-3-sulfonic acid, 1-hydroxy-G-N-methylaminonaphtha1ene-3-sulfonic acid, 1-hydroxy-6-N-cyclohexylaminonaphthalene 3 sulfonic acid, 1-hydr0xy-6-N-phenylaminonaphthalene-3-sulf0nic acid, l-hydroxy-6-N-phenylaminonaphthalene 3,4 disulfonic acid, l-hydroxy-6-N- (3 -carboXy-phenylamino) -naphthalene-3- sulfonic acid, 1-hyd1'oxy-6-N- 4-carboxy-phenylamino) -naphthalene-3- sulfonic acid, l-hydroxy-6-acetylaminonaphthalene-3-sulfonic acid, 1-hydroxy-6-benzoylaminonaphthalene-3-sulfonic acid, 1-hydroxy-6-aminonaphthalene-3,5-disulfonic acid, 1-hydroXy-7-aminonaphthalene-3-sulfonic acid, 1-hydroxy-7-acetylaminonaphthalene-3-sulfonic acid, l-hydroxy-7-N-phenylaminonaphthalene-3-sulfonic acid, l-hydroxy-B-aminonaphthalene-S-sulfonic acid, 1-hydroxy-8-acetylaminonaphthalene-5-sulf0nic acid, l-hydroxy-8-aminonaphthalene-3,6-disulfonic acid, 1-hydroxy-8-acetylaminonaphthalene-3,6-disulfonic acid, 1,8-dihydroxynaphthalene-3,6-disulfonic acid, 1,6-dihydroXy-5-(2'-carboxybenzene-1'-azo) -naphthalene- 3-sulfonic acid, 1,6 dihydroxy 5 (4'-nitro-2'-carboxybenzene-l-azo)- naphthalene-3-sulfonic acid, 1,6-dihydroxy-5-(2-carboxybenzene-1-azo)-naphthalene- 3,5'-disulfonic acid, 1,6-dihydroxy-5- (2-hydroxybenzenel '-azo -naphthalene- 3,5-disulfonic acid, 1,6-dihydroxy-5-(2'-hydroxybenzene-1-azo) -naphthalene- 3,4'-disulfonic acid, 1,5 -dihydroxy-6- 2'-hydroxynaphthalenel -azo -naphthalene-3,4-disuifonic acid, 1,5-dihydroxy-6- (2-hydroxynaphthalenel -azo) -naphthalene-3,6'-disulfonic acid, 1,5 -dihydroxy-6-( 1'-hydroXynaphthalene-2-azo -naphthalene-3,4'-disulfonic acid, 1,5-dihydroxy-6-( 1-hydroxynaphthalene-2-azo -naphthalene-3,3,6-trisulfonic acid, 1,5-dihydroxy-6-(1'-phenyl-3'-methyl-5 pyrazolone 4'- azo)-naphthalene-3,4"-disulfonic acid, 1-hydroxy-6-amino-5- (benzene-1'-azo) -naphthalene-3-sulfonic acid, l-hydroxy-G-amino-S-(2'-carboxybenzene-1'-azo) naphthalene-3-sulfonic acid, 1-hydroxy-6-amino-5-(4'-nitro-2-carboxybenzene-1'-azo)- naphthalene-3-sulfonic acid, l-hydroxy-G-amino-S-(benzene-1'-azo)-naphthalene-3,3-

disulfonic acid, l-hydroxy-6-amino-5-(benzene-1'-azo)-naphtha1ene-3,4'-

disulfonic acid, etc.

In so far as the aforesaid hydroxynaphthalene compounds are capable of metal complex formation, they may be coupled in metallized form with the diazotized aminodisazo dyestuff.

Illustrative of compounds of Formula III which may be used in the second aforedescribed process embodiment are:

4-amino-4'-nitrostilbene-2,2'-disulfonic acid, 4-amino-4-acetylarninostilbene-2,2'-disulfonic acid, 4-amino-4-carbethoxyaminostilbene-2,2'-disu1fonic acid, 4-amino-4'-acetylaminodiphenyl-3-su1fonic acid, 4-amino-4'-carb0methoxyamin0diphenyl-3-sulfonic acid, 4-amino- 4'-nitrobenzoyl) -arninobenzene, 4-amino-(4'-nitrobenzoyl)-aminobenzene-3-sulfonic acid, 4-amino-(4'-carboethoxyaminobenzoyl) aminobenzene- 3-sulfonic acid,

4-oxalylamino-(4'-aminobenzoyl)-aminobenzene, tion, representative embodiments of the invention. In

4-carbomethoxyamino- (4Z1, aminobenzoyl.).- aminobenthese, examples,.the-v parts arer-parts by weight,:. the .per.-.

'zene, etc.

Acetoacetylamino compounds of Formula IV which may be used according to the third aforedescribed process for preparing the compounds of the present'invention comprise among others: 7

centages are-also by.weight, .and.,the temperatures are in degrees centigrade. 7 Example 1 13.7 parts of 2-aminobenzene-l-carboxylic acid are is'added to a solution, rendered alkaline .with sodium 4'ammo'1acetoacetylammobenzene carbonate, of 48.4 parts of 4=acetoacetylaminoa4-nitro- 4-amino-1-acetoacetylaminobenzene-3-su1fonic acid, 4-carbethoxyarnino-1aacetoacetylaminobenzene, 4-oxalylamino-1-acetoacetylaminobenzene, 4-nitro-l-acetoacetylarninobenzene, etc.

' completion 'of the coupling, the monoazo dyestufi is isolated and stirred into 1000. parts of water. Then, in the course of 2 hours'andata temperature.of'-35'-40, a

diazotized in 120 parts-of water and the diazo suspensionv stilbene-2,2'-disulfonic. acid in 400 parts of water. Upon Suitable acid halides of Formula V comprise, inter solution of 15.8 parts of sodium sulfide in ZOO'partsYofv alia, 4-nitrobenzoyl chloride and 4-nitrobenzoyl bromide. water is added dropwise, the mixture stirred for two more The preparation of the polyazo dyestufis of this invenhours at 40, and theuformed dyestuif isolated. ,7 The dyetion according to the first process embodiment hereinbestuff isthen diazotized bydissolving it in 400 parts of fore described may advantageously be carried out by couwater, adding parts of concentrated hydrochloric acid, pling the diazo compound-of the substituted or unsubstiand then, at 10, adding a solution of 6.9 parts of sodium tuted orthoaminocarboxylic acid of the benzene or naph- 2O nitrite in 50 parts of water. Upon completion of the thalene series in a weak acid or weak alkaline medium diazotization, 25 parts of crystalline sodium acetate are with-the acetoacetylamino compound of Formula I. In added to thediazo mass which is then coupled with 27.5

i those cases where z is an amino group, further diazotizaparts I of the sodium salt of 1-amino-2-methoxynaph-i tion can be carried out directly. Where, however, 2 thalene-6-sulfonic acid in solution in 200 parts of water. is an acylamino group, the latter must first be saponified, 25 Upon completion of the. coupling, the resultant disazo and this can be effected by heating in an acid or in an dyestufi is filtered otf, stirredinto 6p00 parts of water and alkaline medium. Where z is a nitro group, it has to after the addition of 6.9 parts of sodium nitrite, diazotized be converted into the amino group, and care has to be by pouring the suspension into a mixture of 40 parts of taken in this regard not to split the azo bridge. The concentrated hydrochloric acid and,160.parts of an icereduction is advantageously carried out with sodium suland-water mixture. The thus-prepared diazodisazo comfide while heating gently. pound is filtered ofi andadded to a solution of 24.6 parts Upon completion of the diazotization, the aminoazo of the sodium salt of 1-hydroxynaphthalene-4-sulfonir: compound is coupled in an alkaline or weak acid medium, acid in 200 parts of water and 200 parts of pyridine. The preferably one made alkaline. with sodium carbonate or resultant trisazo dyestuif is isolated. made acid with acetic acid or formic acid, with the amine For coppering purposes, the trisazo dyestutf is dissolved of the benzene or naphthalene series which couplesfin in 2000 parts .of water at.85.-90. After the addition of para-position to the amino group and carries, in ortho- 10 parts of'sodium carbonate, thereis. run in, within a position to the amino group, a group which is capable period of 30 minutes,.the complex copper salt solution of metal complex formation, whereby the corresponding prepared by mixing a solution of partsof, crystallized disazo dyestuff is produced. 40 copper sulfate in 250 parts ofwater with 90 parts of an.

The coupling of the diazotized aminodisazo dyeaqueous ammonia solution of 25% strength. The mixstufi with the hydroxynaphthalene compound of Formula ture is boiledunder reflux for 12 hours, and the dye- II is preferably carried out in weak alkaline medium,.for stuff then saltednout andrisolated. Ithcorresponds to the example sodium bicarbonate, potassium bicarbonate or formula I ammonia, and if desired in the presence of a tertiary orand is a dark powder which dissolves in water to form a ganic base, such as pyridine, quinoline or the like. green solution and in concentrated'sulfuric acid to form The'conversion of the polyazo dyestuffsinto their metal an olive-green so1uti0n,; .and dyes cotton and fibers of regenerated cellulose in vivid olive shades of outstanding complex compounds is carried out according to conven fastness to light and of excellent fastness to washing.

tional metallizing procedures. Thus, the following methods may advantageously be employed: heating of the aqueous dyestuff paste or solution with metal-yielding Example 2 agents in the presence of an alkali metal salt ofa low 7 molecular aliphatic carboxylic' acid or heating of the 21.7 parts of Z-amino-l-carboxybenzene-S-sulfonic acid aqueous solution with a complex metal salt. Suitable are diazotized H1300 parts ofwater and the diazo metals are P1} and nlckelpension coupled with 45.4 parts of 4-acetoacetylaminoh Preparatlon of the Polyazo dyestufis accordmg to 4'-aminostilbene-2,2'-disulfonic. acid in solution in 400 the second process embodiment is carried out in the manner hereinbefore outlined. H

According to the third process embodiment, the reaction of the free amino group of the aminoazo compound-obtained by coupling a diazotized ortho-aminoparts of water, rendered alkaline bymeans of sodium carbonate. After completion of the coupling the formed monoazo dyestuff is filtered and then dissolved in 400 parts of water. 25 parts of concentrated hydrochloric. carboxylic acid of the benzene or naphthalene series with and are added to the Solunon after Whlch dlazouzatlon the acetoacetylamino compound of Formula v.IV.with is f 9 by means of a Solution Parts.of the acid halide of Formula V can be carried out in aqueous sodlum nitrite 50 Parts of Water- 11320 solutloll or organic solution or in a mixture of solvents. The presis then Pollred at into a solution of Parts Of the ence of an acid-binding agent such, for example, as an Potassium Salt of y p -6- 1- alkali metal hydroxide or carbonate or bicarbonate or an follic acid in PartS of Water containing 20 Pa s Of organic base, has an accelerating effect on the reaction. Sodi m carbonate. Upon completion of the coupling,

{the following examples set forth, by way of illustrahe disazo ystufi is isolated, stirred into 600 ct water and, after the addition of 6.9 parts of sodium nitrite, diazotized by pouring the dyestufi solution into a mixture of 40 parts of concentrated hydrochloric acid and 160 parts of a mixture of ice and water. The formed diazodisazo compound is filtered oif, and the thus-obtained paste is introduced at into a solution of 36.5 parts of the sodium salt of Z-benzoylamino-S-hydroxynaphthalene-7-sulfonic acid in 200 parts of water, with addition of 10 parts of sodium bicarbonate and 200 parts of pyridine base mixture. The resultant trisazo dyestuff is isolated. The copper complex thereof, prepared after the manner set forth in Example 1, corresponds to the formula and is a dark powder which dissolves in water with formation of a green solution and in concentrated sulfuric acid with formation of a brown-green solution, and dyes cotton and fibers of regenerated cellulose in vivid olivegreen shades of very good fastness properties.

Example 3 21.7 parts of 2-amino-1-carboxybenzene-5-sulfonic acid are diazotized in 250 parts of water and the diazo suspension is coupled with 37.0 parts of the sodium salt of 4-acetoacetylamino-4-amino-1,1-diphenyl-3'-su1fonic acid in solution in 400 parts of water. The resultant aminoazo dyestuff is separated, stirred into 500 parts of water, and the suspension, after the addition of 7 parts of sodium nitrite, introduced into a mixture of 30 parts of concentrated hydrochloric acid and 210 parts of ice. After stirring for four hours at 10, the diazotization is completed. The diazo suspension is poured at 10 into a solution of 27.5 parts of the sodium salt of 1-amino-2-methoxynaphthalene-6-sulfonic acid in 400 parts of water, with the addition of parts of sodium carbonate. Upon completion of the coupling, the disazo dyestufi is isolated, stirred into 600 parts of water and after the addition of 7 parts of sodium nitrite, diazotized at 10 by introducing the suspension into parts of concentrated hydrochloric acid and 200 parts of ice.

fibers of regenerated cellulose in green shades of very good fastness to light and to washing.

The 4-acetoacetylamino-4-aminodiphenyl 3 sulfonic acid, used in this example, is obtained by condensation of 1 mol of diketene with 1 mol of the sodium salt of 4,4-diamino-l,1-diphenyl-3'-sulfonic acid in aqueous medium in the presence of sodium carbonate.

, Example 4 parts of water, rendered alkaline with sodium bicarbonate. The obtained aminoazo dyestuff is diazotized after the manner described in Example 3, the diazo compound coupled with 27.5 parts of the sodium salt of 1-amino-2-methoxyuaphthalene-fi-sulfonic acid, the aminodiazo dyestuff stirred into 600 parts of water and the obtained suspension, after the addition of 7 parts of sodium nitrite, introduced at 10 into a mixture of 30 parts of concentrated hydrochloric acid and 200 parts of ice. The diazodisazo compound is filtered oif and the thus-obtained paste is coupled at 10 with 51.2 parts of the sodium salt of 1,6-dihydroxy-5-(2-carboxybenzene-l-azo)-naphthalene-3,5'-disulfonic acid in solution in 300 parts of water and 300 parts of pyridine base mixture, whereupon the formed tetrakisazo dyestuff is promptly precipitated and isolated.

For coppering, the last-named dyestufi is dissolved in 2500 parts of water. After the addition of 15 parts of sodium carbonate, there is run into the dyestufi solution, at 85-95 in the course of 20 minutes, the ammoniacalcopper oxide solution obtained by mixing a solution of 75 parts of crystalline copper sulfate in 500 parts of water with 150 parts of an aqueous ammonia solution of 25% strength. The metallization mass is boiled for 8 hours under reflux, after which the dyestuff, which corresponds to the formula I o: 04511.4)! 0,11 nots- O- Cu-O o=o I C H: [I

The diazodisazo dyestutf is filtered off and the thus-obtained paste is added at 10 to a solution of 24.6 parts of the sodium salt of Z-hydroxynaphthalene-4-sulfonic acid in 200 parts of Water and 200 parts of pyridine. The formed trisazo dyestuif is isolated.

Coppering of the said trisazo dyestuif is effected after the manner described in Example 1. A dark powder is obtained, which corresponds to the formula and dissolves in water with formation of an olive-green solution and in concentrated sulfuric acid with formadOiH pared by coupling diazotized 1-amino-2-carboxybenzene- O-Cu O 5-sulfonic acid with 1-hydroxy-6-aminonaphthalene-3-su1- fonic acid in acid medium, diazotizing the obtained tion of a gray-green solution, and which dyes cotton and 7b aminoazo compound and boiling the diazoazo compound.

arsena 9,. 74,. 1o

Exqmpl ,5 the filter cake introduced at 10 into a solution of 34.8

The aminoazo dyestufi obtained by coupling 18.9, parts of diazotized Z-amino-1-carboxybenaene-4-sulfonic acid with 34.8 parts of 4-acetoacetylamino-4-amino-1,1- diphenyl-3'-sulfonic acid, is diazotizedafter the manner described in Example 4. The diaz o suspensionis poured at 10 into a solution of 21.7 parts of l ar nino 2-metho- Icy-naphthalene, 12.0 parts of concentrated hydrochloric acid and 400 parts of water. By the addition of 40parts of crystallinesodiurn acetate, the pH value of the coudis'u'lfonic acid in '200 parts" of water arid '200parts ofa 5 dyestufi is isolated and dried.

For coppering, the said trisazo dyestuif, in the form of the moist filter cake, isaddedat 80-90 into a meltof 50 parts of crystalline copper sulfate, 350 parts of crystalline sodium acetate and 100 parts of water.; "Ihe melt is further heated and water is distilled therefrom until the pling Solution'is maintainedbetween 4 and 45. Upon temperature of 107-108 is reached. Boiling is then completion of the coupling, the dyestufi solution is made confirmed for 12 {more hfmrs under reflux Water lk li i h di carbonate and h disazo g is slowly added until all rruneral salts have been dissolved isolated therefrom. The latter is stirred into 600 parts h h y fi emains undiSSOlved, which the parts"o'f the sodium salt "of l hydroxynaphthalene-ii;8

pyridine base mixture, whereupon the resultant'trisazo" of water, and 7 parts of sodium nitrite. are added tothe 15 latter is filtered ofi. After, drying, it'is ada -k powder suspension. The latter is then added at 10 to a which corresponds to the formula 0cu 0 soul I l l. nms-Qnqwc-o O-NHC NH-O O--N=N N=\N I o= wo -oil H038 .1

ture of parts of concentrated hydrochloric acid and and dissolves in water with formation of a green solu 200 parts of ice. The resultant diaz odisazodyestufi is tion, and which dyes cotton and fibers of regenerated filtered off and the thus-obtained paste is introduced at cellulose in green shades of very good fastness properties. 10 into a solution of 30.4 parts of l-hydroxynaphtha- The dyestuflf can also be obtained by first preparing lene-3,8-disulfonic acid in 300 parts of water to which 30 1 amino 4 (4' acetoacetylaminobenzoyl) amino has been added 300 parts of pyridine and 20 parts or" benzene, then Coupling the latter with'diazotized 2-aminosodium bicarbonate, whereupon the formation of trisazo l-carboxy-benzene-S-sulfonic acid, further diazotizing dyestutr" takes place rapidly, after which the 'dyestuff is the aminoazo dyestufi, coupling the diazotized product isolated and dried. with 1-amino-Z-methoxynaphthalene-6-sulfonic acid, and

Coppering of the said dyestuff 1s carried out after the converting the thus-obtained intermediateinto the end manner described in Example 1. The resultant copper product according to the previously-given data of this complex compound, which corresponds to the formula example.

Hons ?-C:1 0 $0311 o-ou-oiz QIH Hotsis a dark powder which dissolves in water with formation Example 7 of a green solution winch dyes cotton and fibers 21.7 parts of 2-amino-1-carboxybenzene-S-sulfonic of regenerated cellulose in 011 shadesof good .fastness to acid. are diazotized in 200 parts of water The diazo washmg and? E l 6 .suspension is coupledwith 43.5 parts of the disodiurn xamp 8 salt of 1-amino-4-(4'-acetoacetylaminobenzoyl)-a.mino- 21.7 parts of Z-amino-l-carbonxybenzene-S-sulfonic benzene-Z-sulfonic acid in solution in 4 0 0 parts of water, acid are diazotized in 200 parts of water and .thediazo rendered alkaline with sodium carbonate. Upon comsuspension coupled with 24.4 parts of the sodiurn salt pletion" of the 'coupli'ng'the'" monoaz'o'dyestuff'is sepaof 1-nitro-4-acetoacetylaminobenzene in solution in 40 0 rated byfiltration, stirred into 300 parts of water, and parts of water. Upon completion of the coupling, the the suspension poured into a mixture 'of 30'p'ar'ts of conmonoazo dyestufr is isolated by filtration, stirred into 500 centrated hydrochloric acid and 200 parts of ice, after the parts of water, and the nitro group reduced by the dropaddition of 6.9parts of sodium nitrite. Upon completion wise addition at 3540 of a solution of 12.0 parts of of the diazotization, the diazoazo compound is separated Sodium Sulfide in 0 Parts of Water- The aminoazo-fl-o by filtration and then stirred into 400 parts of a mixture y fi isolated, dissolyfidin m u 0 09 P .of ice and Water, excess acid being buffered by the addiof water and 200 parts of acetone, and then, in the P tion of sodium acetate until a pH value of 3.5-4.2 is "f of 75 Parts of Sodmm 9 admlxe-d P reached. The suspension is mixed with a solution of h a soluuon of Pal-f .9 i 13.7 parts of l -arnino-2;methoxy-5-methylbenzene in 12 g z f g g gs 53: :33; g gig g igg parts of concentrated hydrochloric acid and ZOO parts of faith 6.9 parts of sodium nitrite and, at a pH value of Stirring beingmcominued with. rcoofinglmitnwthe 3.5a) 4.5, coupled with 27.5 parts of the sodium salt of COuPhng 9 P a F dyesmfi 18 dated 1-amino-2-methoxynaphthalene-6rsulfonic acid ,in 200 and then agam, T 9 h l Th parts of water. Upon completion of the coupling, tii e'ro concentiated' dlazo pulp added W i ,coohng Wlth disazo dyestuff is isolated, stirred into 600 parts ofwat'r, *9 a mlxtul'e of Parts of the Sodlumt sa'lt 7 parts of sodium nitrite added to the suspension and, dlhydroxy 6 hYdroxP'naphthalene 1 azo) at 10, the mixture introducedinto a mixturebfso'parts naphthalene-3,6'-dlsulfomc acld, 200 parts of Water, 200 .of concentrated hydrochloric acid and 200 parts of ice, parts of pyridine and 50 parts of so-di'um bicarbonate. The diazodisazo dyestuff is separated by filtration, and .7.5 Theresultant'tetrakisazo dyestufl is isolated and converted corresponds to the formula and is a dark powder which dissolves in water with formaarsenal The triasazo dyestuifs set forth in the following table possess, in the form of the copper complex compounds,

valuable properties similar to the products described in Examples 1-7.

They can be SOIH prepared by the aforetion of a green solution, and dyes cotton and fibers of 15 described methods and dye coton and fibers of regenregenerated cellulose in gray-green shades of good fastness properties.

erated cellulose in green to olive shades.

Example No.

Ortho-Aminocarboxylic Acid of the Benzene or Naphthalone series Acetoacetylamino Compound of the Formula (I) Hydroxynaphthalene Compound of Formula (II).

2-amino-1-carbcxybeuzene4- sulfonic acid.

4-acetoacetyl-amino-4-aminost%bene-2,2-disulfonic acid. o

1- amino- 2- methoxyuaphthalege-fi'sulfonic acid. o

. do do do do do "do do .do

. do do r1o do ..do do .do .do

. .do do ..-.do do do do do do .do 1-am1no-2,5-diethoxybenzene.

do -do do 1-am1no-2,5-dimethoxybenzene.

do --.d0

.....do l-aarllggfigmethoxy-ii-methyldo do 4-acetoacetylamino-4'-amino- 1-amino-2-methoxynaphthaz116111: dipheuyl 3 sulfonic lene-fi-sulionic acid.

. do do do do ..do ..do

. do do do do do do .do do do do -..do do 4-acetoacetylamiuo-1-(4'- ....do....

aminobenzoyl aminoben 2 hydroxynaphthalene 4 sulfo ic d 1-hydroxynaphthalene-3,6-d.i-

sulfonic acid.

1-hydroxynaphthalene-3,8-disulfonic acid.

2-hydroxwnaphthalene-3,6-disuli'onic acid.

1-hydroxy-8-acetylamin0naphthaleue-3,6-disulfonic acid.

1-hydroxy-6-benzoy1amino-3,5-

disulfonic acid.

1-hydroxy-8-acetylaminonaphthalene-5-sulfonic acid.

1 hydroxynaphthalene 4 sulfonic acid.

2 hydroxynaphthaleue 4 sulfouic aci 2 hydroxynaphthalene 6 eulfonic acid.

1- hydro xy- 6 N- phenylaminonaphthalene-3-sulfonic acid.

1-hydroxy-6- (4-chlcro) benzoylaminouaphtha1ene-3'sulionic acid.

1-hydroxy-8-acety1aminonaphthalene-5-sulfonic acid.

2-hydroxy-6-propi0nylaminonaphthalenei-sulfonic acid.

l-hydroxynaphthalene-3,6-disuifonic acid.

1-hydroxynaphthalene-3,8-disulfonic acid.

1 hydroxy 8 butyrylamino naipihthalene 8 6 -disulion1c 1 8 dihydroxynaphthaleue 3 6-disulionic acid.

1, 6-dihydroxy-5- (2-hydroxybenzene 1 azo) naphtha lene-3,4-disu1fonic acid.

1,5-dihydroxy-6-(1-phenyl-3'- m yl 5 pyrazolone 4 azo)-naphtha1eue-3,4"-disulionic acid.

2 hydroxynaphthalene 6 sul nic acid.

fomc acid.

1 hydroxynaphthalene 4 sul ionic acid.

1 hydroxynaphthalene 6 N cyclohexylaminonaphtha- 1ene-3-su1fonic acid.

1 hydroxynaphthalene 6 N (4 methyl) phenylamino naphthalene 3 suifonic acid.

1 hydroxynaphthaleue 3 6 disulfonic acid.

Amine of thc B c izene or gaphlthallgn; Seriesfiwyhic? V ortho-Aminccarboxylic Acid Acetone; oup ampos ylamino Compound the Amino Groupand hav- IEIydroxynaphthalcnc Com- Examp Benzene Naphtha' oi the Formula (I) mg, m Qzthc-Position to the pound or Foufiiila m.

lend series Amino Group, a Group Capable of Metal Complex Formation 2 hydroxynaphthalene 3,6

39 2-amino-1-carboxybenzenc-4- 4-acetoacetyiamino-i-(4'aminol-amino-Z-methoxynaphthasulionic acid. benzoyD-aminobinzcnc. lene-fi-suifonic acid. disulionic acid.

40 io i ..d0 2 -hydroxynaphthalenc 6,8

disulfonic acid.

41 do "do"... 1-hydroxy-8-acetyiaminonaphtha1ene-3,6-disu1fonic acid.

42 2-amino-1-carboxybenzene-5- .do l-hydroxy-fi-aminonaphthaienesulfonic acid. 3,5:disulionic acid.

43 ..do d0...- 1,8'- dihydroxy naphthaiene 3,

i 6 disulionic acid.

44 -d0; 4-amino-1 (4-acetoacety1ami-' 1-amin0-2'-ethoxy-naphthal-hydroxy-fi N-phenylaminonobenxoyl) -aminobcnzenelena-6-sulionic acid. naphtHa1ene-3-su1fonic acid. 3-su1fonic acid 45 ..do do do 1-hydroxy-8-acetylaminonaphthaiena-fi-sulfonic acid.

46 o fln do 1 -hydroxynaphtha1ene-4-su1- ionic acid.

47--.. o do ..do 2-hydroxynaphthalcne-4-su1- Ionic acid.

48 .do do 1-amino-2-methoxynaphtha- 1 hydroxynaphthalcne 3,6

lane. disulfonic acid. 49 .do do .-d0 1,8 dihydroxynaphthalene 3,

' 6-disulfonic,acid. 50 .do do l-aminc-2-ethoxynaphtha1cne. 1-11ydroxy-8-aminonapi t11a,-

4 lcne-3,6-disulfonic acid.

51 do 4-acetoacetylamino-4'-amino- 1-amino-2'-methoxynaphthal-hydroxy-G-N- (4'-methyl) 1-,1 diphenylurea 3' -sui lenc-fi-sultonic acid. phenylaminonaphthaiene-iiionic acid. sulfonic acid.

52 d0 do 1-hydroXy-6-acetylaminonaphthalene-3-su1fonic acid.

53 do do 1-hydroxy-8-acetyiaminonaphtha1cne-5-sulfonic acid.

54 -do do 1 hydroxynaphthalene 4 -su1 Ionic acid.

55 do do 1 hydroxynaphthaiene 3 6 disulfonic acid.

56 do do l-hydroxy -8.-amincnaphthav lane-3,6-disulfonic acid.

57 ..do; 4-amino-1- (4, -acetoacetyla- 1-am1no-2-meth0xy 5-methyl- .1-hydr0xy-6-N-pl1enyl-aminominobenzoyl) aminoben benzene. naphthalene-3,4-disu1fonic zcue-3-catboxy1ic acid. acid.

58 .do do ..do 1-hydroxy-6-N-(3-carboxy)- pheny1ammo-naphtha1cne-3- Y sulionic acid.

59 do 4 acetoacetylamino 1 (4 1-amino-2-methoxynaphthal-hydroxy-G-N-methylaminoaminobenzoyl) aminoben lcne-fi-sulionic acid. naphthalene-:i-suifonic acid. zcne-2-oarb0xy1icacid.

60 ..do do 1 hydroxy 6 N ethylamino naphthalene-3-su1ionic acid.

61 do 4-acetoacety1amino-4'-am1nol-hydroxy-fi-N-propylamino- *1',1'-diphenyl. naphthaIenc-S-aulfonic acid.

62 do d6; l-hydroxy-G-N-phenylaminoniuzihthalene 3 3 disulionie a c 63 'do 1-.hydroxy-6-N-(3-mcthoxy)- phenylamino naphthalene 3-su1ionic acid.

64 do do ..do l-hydroxy-S-N-carbomei;hcxyaminonaphthalene 3 sul ionic acid.

65 n do do l-hydroxy-G-N -carbcthoxyaminonaphthalene 3 sul ionic acid.

66 do do .do 1-hydroxy-6-N-carbopropoxyaminonaphthalene 3 sul I ionic acid.

67 .do i-acetoacetylamino=4-amino- 1-amino-2-meth0xy-5-methyi- 1,5-dihydroxy -6- (1 -phenyl stilbcnc-2,2-disulionic acid. benzene. 3 -me-t1 1y1- 5 -pyrazoione-4' aztia -naphthalene 3 sulionic ac 68 d0 d0 do 1,-5-dihydroxy-6-[1-(3-ch1oro)- phcnyl -3 -mcthy1-5 -pyra zolone 4' -azc] -naphthalene 8-sulfonic acid.

Formulae of representatlve "dyestuffs 'of the foregoing table are:

0Ou O H0 18 1}I=N-O-C 0NH CH=C H N=N N=N o: o-cu-o 80,11 03H Ems -NH 2,784,051 17 v 18 Example 69 fonic acid group, v stands for a member selected from the group consisting of hydrogen, hydroxy, amino, lower alkyl amino, cycloalkylamino, mononuclear carbocyclic arylamino and acylamino groups, w stands for a member 5 in ortho-position to v selected from the group consisting mg 0.1 part of dyestuff, after Wl'llCh the bath 1s heated to GT: carbocyclic aryls and pyrazo boiling in the course of a half hour, the boiling temperalones b Stands for a member in Orthomosition to ture being maintained for a further half hour. In the seleced from the group consisting of the methoxy and course of the dyeing process, 0.5 to 2 parts of sodium the ethoxy group, n is one of the integrers 1, 2 and 3, sulfate are added in the form of a concentrated aqueous 10 m is one f the integers 1 and 2, and wherein 0 solution. Upon completion of the dyeing process, the Stands in (mhmposition and in parawosition dyed material is allowed to cool to 50 in the bath, and to d CQOH t d i orthwposition to 5 parts of cotton are wetted in a dyebath containing 100 parts of lime-free Water at 50. There is then added to the dyebath a concentrated aqueous solution containis then rinsed and dried.

Having thus disclosed the invention, what is claimed 2. The asymmetrical cupriferous polyazo dyestufl of the is: 15 formula 0Cu 0 t QI T=NCC O-NH-OCH=CH-C N=N N=N o= o-ou-ofl dour siodi Hl I 01H 0:3 1. An asymmetrical copper complex compound of a 3. The asymmetrical cupriferous polyazo dyestufl of polyazo dyestufi which corresponds before conversion the formula o--ou o I?I=NO-C ONEQN=N N--\-N l 0= obu--o Join note 0;Cu-OC=0 oni N==N into the copper complex compounds, to the formula 4. The asymmetrical cupriferous polyazo dyestufi of I o R1&Zo' C H-C (S 01H) a! $0013 oi. v

iii-I, (10). V wherein R1 stands for a radical of the benzene series, the formula 0--Cu O HmsQrbm-o-o ONHQ-CH=GHQN=N N=\IN I o= o-ou-oii 0.11 0.11 no. NH-O R: stands for a radical selected from the group consisting 5. The asymmetrical cupriferous polyazo dyestufi of of radicals of the benzene and naphthalene series, 1: the formula 0-Cu 0 HwQu-N-o-oo-NnOQmm N-N l o-= o--u-oii OIH (BE: A

01H OIH stands for a member selected from the group consisting 6. The asymmetrical cupriferous polyazo dyestufi of of the simple diphenyl linkage, the CH=CH, the the formula o-ou o NHoocm References Cited in the file of this patent NH.CO-, the CO.NH- and the -NH.CO.NH UNITED STATES PATENTS bridge, y stands for a member selected from the group 1 594 865 Zitscher Au 3, 1 2 consisting of the hydrogen atom, the carboxy and the s l- 2,300,636 Sieglitz et al Nof'. 3, 134 

1. AN ASYMMETRICAL COPPER COMPLEX COMPOUND OF A POLYAZO DYESTUFF WHICH CORRESPONDS BEFORE CONVERSION INTO THE COPPER COMPLEX COMPOUNDS TO THE FORMULA 